Will this interfere with my trunk seal or hatch closure?

No. The lip is designed to sit under the front bumper and does not extend upward into the hood area. It maintains proper clearance from all moving panels.

Do I need to drill through the body to mount this?

No. This lip uses factory mounting points on your existing bumper structure, so no drilling or permanent modification is required.

Will this lip stay stable at highway speeds?

Yes. The FRP construction is rigid enough to maintain its shape under airflow, and the factory-point mounting ensures it won't flex or rattle once secured.